rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=ab2/1/0x4000000000000000 softirq=13982/13991 fqs=5158 (t=10500 jiffies g=10537 q=1921) NMI backtrace for cpu 0 CPU: 0 PID: 11728 Comm: syz-executor.5 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x93/0xc2 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x222/0x2a7 kernel/rcu/tree_stall.h:341 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline] check_cpu_stall kernel/rcu/tree_stall.h:697 [inline] rcu_pending kernel/rcu/tree.c:3830 [inline] rcu_sched_clock_irq.cold+0x4f7/0x11dd kernel/rcu/tree.c:2650 update_process_times+0x13b/0x1c0 kernel/time/timer.c:1796 tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226 tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x18a/0xb00 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x2f9/0x920 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/irqflags.h:81 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:145 [inline] RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:105 [inline] RIP: 0010:ktime_get_coarse_with_offset+0x142/0x180 kernel/time/timekeeping.c:891 Code: 31 f6 48 c7 c7 c8 8a 98 8a ff 74 24 38 e8 a6 8a f6 ff 48 8b 74 24 40 48 c7 c7 c8 8a 98 8a e8 85 83 f6 ff e8 f0 84 12 00 fb 5a 61 ff ff ff 0f 0b e9 02 ff ff ff 4c 89 ef e8 aa 09 48 00 e9 6a RSP: 0018:ffffc900000075f8 EFLAGS: 00000212 RAX: 00000000010b4980 RBX: 0000000000000001 RCX: 1ffffffff1c80572 RDX: ffffffff84465a77 RSI: ffffffff88aae320 RDI: ffffffff88fb9bc0 RBP: ffff888027838000 R08: 0000000000000001 R09: ffffffff8e3bb91f R10: 0000000000000001 R11: 0000000000000001 R12: fffffbfff1531172 R13: ffffffff8a988b90 R14: ffff88803c0dea00 R15: ffff888027838068 ktime_get_coarse_boottime include/linux/timekeeping.h:99 [inline] ktime_get_coarse_boottime_ns include/linux/timekeeping.h:135 [inline] wg_birthdate_has_expired drivers/net/wireguard/timers.h:28 [inline] wg_packet_send_staged_packets+0x2e7/0x1320 drivers/net/wireguard/send.c:364 wg_xmit+0x6b6/0xd80 drivers/net/wireguard/device.c:197 __netdev_start_xmit include/linux/netdevice.h:4825 [inline] netdev_start_xmit include/linux/netdevice.h:4839 [inline] xmit_one net/core/dev.c:3605 [inline] dev_hard_start_xmit+0x1a5/0x6f0 net/core/dev.c:3621 __dev_queue_xmit+0x1ac8/0x26a0 net/core/dev.c:4194 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0x50c/0x1410 net/ipv6/ip6_output.c:117 dst_output include/net/dst.h:448 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ndisc_send_skb+0x97e/0x1490 net/ipv6/ndisc.c:508 addrconf_rs_timer+0x24b/0x720 net/ipv6/addrconf.c:3877 call_timer_fn+0x163/0x4b0 kernel/time/timer.c:1431 expire_timers kernel/time/timer.c:1476 [inline] __run_timers.part.0+0x52a/0x8b0 kernel/time/timer.c:1745 __run_timers kernel/time/timer.c:1726 [inline] run_timer_softirq+0x9c/0x190 kernel/time/timer.c:1758 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345 invoke_softirq kernel/softirq.c:221 [inline] __irq_exit_rcu kernel/softirq.c:422 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:434 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:debug_lockdep_rcu_enabled+0x1d/0x30 kernel/rcu/update.c:280 Code: 55 5e c3 77 00 00 00 f0 c3 cc cc cc cc 8b 05 4e 37 18 04 85 c0 74 21 8b 05 4c 67 18 04 85 c0 74 17 65 48 8b 04 25 00 f0 01 00 <8b> 80 94 09 00 00 85 c0 0f 94 c0 0f b6 c0 c3 cc cc cc cc 55 53 48 RSP: 0018:ffffc9000b1cfc80 EFLAGS: 00000202 RAX: ffff888020e78000 RBX: 0000000000000000 RCX: ffffffff81512b71 RDX: fffffbfff18ade4a RSI: 0000000000000008 RDI: ffffffff8c56f248 RBP: 1ffff92001639f93 R08: 0000000000000000 R09: ffffffff8c56f24f R10: fffffbfff18ade49 R11: 0000000000000001 R12: ffff88814264f750 R13: 0000000000000003 R14: 0000000000000001 R15: ffffffff8c572348 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x517/0x710 kernel/locking/lockdep.c:5521 up_write+0x78/0x560 kernel/locking/rwsem.c:1458 inode_unlock include/linux/fs.h:780 [inline] perf_fasync+0x83/0xb0 kernel/events/core.c:6260 setfl fs/fcntl.c:74 [inline] do_fcntl+0x4cc/0xe10 fs/fcntl.c:355 __do_sys_fcntl fs/fcntl.c:471 [inline] __se_sys_fcntl fs/fcntl.c:456 [inline] __x64_sys_fcntl+0x11a/0x160 fs/fcntl.c:456 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465d99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f86afb7a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000048 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465d99 RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00000000004bcf27 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd062d78ff R14: 00007f86afb7a300 R15: 0000000000022000